Boiler fire box



Aug. 24 1926.

. C. E. JOHNSQN BOILER FIRE BOX 2 Sheets-Sheet 1 Filed August 30, 1924 C. E. JOHNSON BOILER FilRE BOX Filed Aug. 24 1926.

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Patented Aug. 24, 1926.

CARL E. JOHNSON, OF CHICAGO, ILLINOIS.

BOILER FIRE BOX.

Application filed August 30, 1924. Serial No. 735,099.

v This invention relates to improvements in boiler fire boxes and has particular reference to improvements in battle plates and deflecting walls for fire boxes.

The general objects of the present in vention are to provide a construction of a bafile for a boiler fire box which can be arranged in such a manner with respect to the fiues that easy access to the fines for cleaning them may be readily had.

further object of the invention is to provide an improved baffle plate construction which will materially enhance the co-1nin ding and admixing of the fire box gases for the purpose of producing substantially perfeet combustion in the fire box.

A further object of the invention is to provide an improved baffle plate construction by means of which fire clay and asbestos or other refractory materials may be sup-i ported on the baffle plates.

A still further object of the invention is to provide an improved form of oppositely disposed hinged baffle plates which are adapted to swing within the fire box and permit easy access to the fines which must be cleaned at regular intervals without removing the plates from the fire box.

These and other objects are accomplished by providing a construction and arrangement of the various parts in the manner hereinafter described and particularly pointed out in the appended claims.

Referring to the drawings, Fig. 1 isa .cross sectional view taken on a vertical plane passin. through the longitudinal center of the boiler fire box.

Fig. 2 is a cross sectional view of the boiler fire box taken on thelines 2-2 in Fig. 1 looking in the direction indicated by the arrows and showing my improved battle plates mounted therein. i

Fig. 3 is a detailed cross sectional view taken on the lines 3--3 in Fig. 2. i i Fig- 4 is an enlarged fragmentary View partly in section showing the construction of the hinge for supporting my improved baffle plates, and

i F ig. 5 is a perspective view of one of the removable sections forming the upper extension of the baffle plates or deflecting wallsf r i l e In connection with the efiicient operation of a boiler it is essential to cleanthe ,fiues of the boiler at regular intervals and'where refractory battles or deflecting walls are built of fire brick and positioned in the fire box adjacent the fines it is necessary in order to get access to the flues for the purpose of cleaning, to completely knock down the fire brick on each occasion that the fines are cleaned. This method entails considerable expense and time and in each instance it is necessary to completely extinguish the fire in the box in order that the fire brickwall may be removed from the fire box. In the present invention I have overcome these difliculties by providing a construction of the hinged battle plates which swing from the center toward the sides of the fire box and permit easy access to the fiues without the necessity of extinguishing the fire in the fire box. j

In carrying out my invention I have shown the same in connection with a boiler 10 provided with the usual outer wall or sheet 11 and inner fire box wall or sheet 12. The outer wall 11 and the inner fire box wall 12 are provided with end sheets 13 and 141, respectively, which in turn, are provided with a common opening 15 extend ing into the fire box. The fire box is provided with the usual flue sheet 16 which is secured thereto at its forward end in any well known manner. Secured to the flue sheet 16 in the manner well known are the usual fiues 17 which extend into the boiler iron and are hinged to the opposite vertical sides 21 of the fire box by means of hinged brackets 22 which are secured to the fire box sides by means ofhead-sunk bolts 23. Each of the baflie plates are in the form of doors and are hingedly mounted on spaced apart brackets by means of hinge pins 24:, which are positioned in registering apertures of each of the battle plates and laterally projecting portions 25 of eaehof the brackets 22. Each of the baflie plates 20 are provided with spaced apart apertures as shown at 26 and centrally overlapping vertical flanges 27 so that either baffle plate may be used on either side of the fire box.

Each of the baflle plates is cast with a main web 28 and has formed integrally therewith transverse and. vertical ribs 29 and 30, respectively fit In order to securely support the fire clay, asbestos or other refractory material in position between these vertical and transverse ribs, I preferably position relatively short wires 31 at spaced intervals in the mold previously to pouring the molten metal for casting these bafile plates. It will readily be seen that with these wire projections protruding from the web portion 28 of the battle plate that th fire clay, asbestos or other refractory material which is in plastic condition will readily adhere to thebafile plates while in plastic condition and will permanently secure the refractory material after once it is set. From the above description it will of course be understood thatthere is sufiicient looseness or sp'ace between each of the swinging baffle plates or doors that if a rod engaged sneer the bane doors 20, which has the forward overhanging fiange 27, that that particular door could be swung in a direction away from the fiues 17 about its hinges and permit easy access to the fines for the purpose of cleaning them without the necessity of extinguishing the fire.

In order to complete the deflecting wall in the upper part or dome portion 32 of the firebox12 I have provided anextension of each of the baffieplates in the form of removable sections 33 which have relatively flat bases 3t adapted to seat on the upper surface of each of the bafile plates or doors 20 and a curved portion 35 which conforms to the curvature of the dome portion 82 of the fire box. Each of these removable sections are preferably cast of metal and are provided with sockets 36 by means of which each of these sections may be removed by inserting a rod in'the sockets 36 and removing them tromthe top of each of thehinged bafi'le plates 20. Y From the above description it will readily be understood that with my improved hinged construction of bafile plate when it is necessary to clean the fines each or the removable sections 83 are withdrawn by inserting a rod in the socket 3 6 of the section and removing it from the top of the bafile plate after which each or. the hinged baffie plates 20 may be swung about their respective pivotsin a directionaway from the fines 17 so that easy access to the fines may be hadpfor cleaning them. After the cleaning has" been completed it will be readily understood that the battle plates may berea dily swung back to their normal operative position and removable sections replaced, or to the position shownin Fig. 2. will further be noted that this may be 1 12 thoet h neces ty x g sher the; ti e 1 Whil'e the above specification l have described one embodiment which my invention may assume in practice, it""will', of

course, be understood that thesame is capable of modification and that modification may be made without departing from the spirit and scope of my invention as expressed in the following claims.

' What I claim as my invention and desire to secure by Letters Patent is l. The combination with a boiler of a fire box therefor, a plurality of fiues extending i'ronisaid fire box through said boiler, a movable baffle positioned between the fire in said fire box and said fiues and a section removably carried by said bafile for bafiling said fire bOXflODl said flues.

2. The combination with a boiler of a fire box therefor, a plurality of fiues extending from said fire box through said boiler, a baffle plate pivoted to one side of said fire box adjacent said fines and a removable section carried by said bafile plate for baffling said fire box from said fines.

3. The combinationwitha boiler of a fire box therefor, a plurality of fines extending oppositely disposed movable baffle plates mounted on the opposite side of said fire box adjacent said fiues and removable sections mounted on thetop of said balile plates for completely 'baifiing said fire box from said fines.

4L. The combination with a boiler of a fire box therefor, a plurality of lines extending from said fire box through said boiler, a plurality oi" baifie plates pivoted to the opposite sides of said fire box adjacent sai'd fines and means mounted on the top of said bafile plates for completely battling the fire box adjacent said fi ues.

'5, The combination with a boiler of a fire box therefor, a plurality of fiues extending from said fire box through said boiler, a plurality of bafile plates pivoted to the sides ot'. said fire box, and removable sections mounted on each of said bafiie plates for completely bafiiing the fire box acent said flues.

6. The combination with a boiler. of a fire box therefor having vertical side walls and adomedike top, a plurality of fiues extending from said fire box through said boiler a pair of baffle plates pivoted to said vertical side walls and a pair of removable sections adapted to be mounted on said bafile plat-es for completely the firebox adjacent said fiues.

7. The combination witha boiler of a fire box therefor, having vertical side walls and a dome-like top, flues, extending from said firebox through said boiler, a pair of battle platespivoted to said side walls and having overlapping flanges and a pair of curved rons onf rm ng, he he s ap "O sa for 603 11 said fire box;

k or. and "mounted on a d 11 V 8. The combination with a boiler of a fire tions carried by each of said baffle plates and box therefor having vertical side Walls and conforming to the shape of said dome-like 1 a dome-like top, flues extending from said top for completely baflling said fire box fire box through said boiler, bafiie plates from saidfiues.

5 pivoted to the side Walls of said fire box In testimony whereof I have signed my and adapted to swing from the longitudinal name to this specification, on this 28th day center of the fire box to a position parallel of August A. D. 1924. with the sides of said fire box and baflie see CARL E. JOHNSON. 

